She wants to make the "set" builtin command ,what can set an environment variable to a value,for example:' set APPLE "RINGO" ' sets the APPLE environment variable to the RINGO value.
Unfortunately I'm not too good at POSIX prohramming,so I can't help her.
So please if you don't mind help us.
+She will be very happy if somebody show,how can she made a "get" bulletin, what gives back the value of an environment variable.